中国体外循环杂志
中國體外循環雜誌
중국체외순배잡지
CHINESE JOURNAL OF EXTRACORPOREAL CIRCULATION
2015年
2期
113-118,122
,共7页
赵国龙%张秋芳%翟蒙恩%于立明%高文丽%金振晓%段维勋%俞世强%王云
趙國龍%張鞦芳%翟矇恩%于立明%高文麗%金振曉%段維勛%俞世彊%王雲
조국룡%장추방%적몽은%우립명%고문려%금진효%단유훈%유세강%왕운
褪黑素%褪黑素受体%心肌缺血再灌注损伤%沉默信息转录调控因子1%心肌保护
褪黑素%褪黑素受體%心肌缺血再灌註損傷%沉默信息轉錄調控因子1%心肌保護
퇴흑소%퇴흑소수체%심기결혈재관주손상%침묵신식전록조공인자1%심기보호
Melatonin%Melatonin receptor%Myocardial ischemia/reperfusion injury%SIRT1%Cardioprotection
目的:研究褪黑素膜受体( MR)在褪黑素( Mel)抗心肌缺血再灌注( MI/R)损伤机制中的作用。方法雄性SD大鼠80只随机分为四组:假手术组( Sham)、MI/R+溶剂对照组( MI/R+V)、MI/R+Mel治疗组( MI/R+Mel)、MI/R+Mel+Luz组( MI/R+Mel+Luz),Luz( Luzindole)为MR特异性阻断剂。大鼠冠状动脉左前降支结扎和松开方法建立大鼠MI/R模型,心肌缺血30 min,再灌6 h后ELISA法检测心肌组织氧化应激相关指标,TUNEL法检测心肌细胞凋亡率,Evans blue-TTC双染法测定梗死面积,Western blot法检测沉默信息转录调控因子1( SIRT1)、乙酰化叉头转录因子1( Ac-Foxo1)、Caspase-3及褪黑素受体( MR)的表达水平,再灌注72 h后超声心动图法检测各组大鼠心功能。结果与缺血再灌注组相比,Mel治疗显著改善心脏左室射血分数[LVEF,(65.18±5.863)%vs (47.37±4.201)%, P<0.01]及左室短轴缩短率[LVFS,(36.19±3.299)%vs (22.80±0.8881)%, P<0.01],下调心肌组织超氧化物[(2.881±0.1908)RLU/(mg·s) vs (3.955±0.3022) RLU/(mg·s), P<0.01]、丙二醛(MDA)生成[(269.1±11.24)pmol/mg vs (412.7±24.39)pmol/mg, P<0.01]及gp91phox的表达[(3.404±0.2440) vs (4.388±0.1463), P<0.01],上调超氧化物歧化酶(SOD)[(35.83±2.959)U/mg vs (21.11±2.004)U/mg, P<0.01]、SIRT1[(0.8033±0.05357) vs (0.3313±0.04337)], P<0.01],下调Ac-Foxo1水平[(0.2393±0.01440) vs (0.3536±0.01384), P<0.01];而Luz阻断MR后逆转Mel的上述作用(均P<0.01)。结论 Mel通过MR激活SIRT1信号通路,显著减轻大鼠MI/R氧化应激损伤,发挥抗氧化应激抗凋亡心肌保护作用。
目的:研究褪黑素膜受體( MR)在褪黑素( Mel)抗心肌缺血再灌註( MI/R)損傷機製中的作用。方法雄性SD大鼠80隻隨機分為四組:假手術組( Sham)、MI/R+溶劑對照組( MI/R+V)、MI/R+Mel治療組( MI/R+Mel)、MI/R+Mel+Luz組( MI/R+Mel+Luz),Luz( Luzindole)為MR特異性阻斷劑。大鼠冠狀動脈左前降支結扎和鬆開方法建立大鼠MI/R模型,心肌缺血30 min,再灌6 h後ELISA法檢測心肌組織氧化應激相關指標,TUNEL法檢測心肌細胞凋亡率,Evans blue-TTC雙染法測定梗死麵積,Western blot法檢測沉默信息轉錄調控因子1( SIRT1)、乙酰化扠頭轉錄因子1( Ac-Foxo1)、Caspase-3及褪黑素受體( MR)的錶達水平,再灌註72 h後超聲心動圖法檢測各組大鼠心功能。結果與缺血再灌註組相比,Mel治療顯著改善心髒左室射血分數[LVEF,(65.18±5.863)%vs (47.37±4.201)%, P<0.01]及左室短軸縮短率[LVFS,(36.19±3.299)%vs (22.80±0.8881)%, P<0.01],下調心肌組織超氧化物[(2.881±0.1908)RLU/(mg·s) vs (3.955±0.3022) RLU/(mg·s), P<0.01]、丙二醛(MDA)生成[(269.1±11.24)pmol/mg vs (412.7±24.39)pmol/mg, P<0.01]及gp91phox的錶達[(3.404±0.2440) vs (4.388±0.1463), P<0.01],上調超氧化物歧化酶(SOD)[(35.83±2.959)U/mg vs (21.11±2.004)U/mg, P<0.01]、SIRT1[(0.8033±0.05357) vs (0.3313±0.04337)], P<0.01],下調Ac-Foxo1水平[(0.2393±0.01440) vs (0.3536±0.01384), P<0.01];而Luz阻斷MR後逆轉Mel的上述作用(均P<0.01)。結論 Mel通過MR激活SIRT1信號通路,顯著減輕大鼠MI/R氧化應激損傷,髮揮抗氧化應激抗凋亡心肌保護作用。
목적:연구퇴흑소막수체( MR)재퇴흑소( Mel)항심기결혈재관주( MI/R)손상궤제중적작용。방법웅성SD대서80지수궤분위사조:가수술조( Sham)、MI/R+용제대조조( MI/R+V)、MI/R+Mel치료조( MI/R+Mel)、MI/R+Mel+Luz조( MI/R+Mel+Luz),Luz( Luzindole)위MR특이성조단제。대서관상동맥좌전강지결찰화송개방법건립대서MI/R모형,심기결혈30 min,재관6 h후ELISA법검측심기조직양화응격상관지표,TUNEL법검측심기세포조망솔,Evans blue-TTC쌍염법측정경사면적,Western blot법검측침묵신식전록조공인자1( SIRT1)、을선화차두전록인자1( Ac-Foxo1)、Caspase-3급퇴흑소수체( MR)적표체수평,재관주72 h후초성심동도법검측각조대서심공능。결과여결혈재관주조상비,Mel치료현저개선심장좌실사혈분수[LVEF,(65.18±5.863)%vs (47.37±4.201)%, P<0.01]급좌실단축축단솔[LVFS,(36.19±3.299)%vs (22.80±0.8881)%, P<0.01],하조심기조직초양화물[(2.881±0.1908)RLU/(mg·s) vs (3.955±0.3022) RLU/(mg·s), P<0.01]、병이철(MDA)생성[(269.1±11.24)pmol/mg vs (412.7±24.39)pmol/mg, P<0.01]급gp91phox적표체[(3.404±0.2440) vs (4.388±0.1463), P<0.01],상조초양화물기화매(SOD)[(35.83±2.959)U/mg vs (21.11±2.004)U/mg, P<0.01]、SIRT1[(0.8033±0.05357) vs (0.3313±0.04337)], P<0.01],하조Ac-Foxo1수평[(0.2393±0.01440) vs (0.3536±0.01384), P<0.01];이Luz조단MR후역전Mel적상술작용(균P<0.01)。결론 Mel통과MR격활SIRT1신호통로,현저감경대서MI/R양화응격손상,발휘항양화응격항조망심기보호작용。
[ Abstract]:Objective To investigate the protective effect of melatonin ( Mel) on myocardial ischemia/reperfusion ( MI/R) in?jury and the influence of melatonin membrane receptor ( MR) on MI/R injury. Methods Eighty male Sprague-Dawley rats were subjected to myocardial ischemia/reperfusion ( MI/R, I 30 min, R 6 h) operation and randomly divided into 4 groups: Sham, MI/R+V, MI/R+Mel and MI/R+Mel+Luz ( Luzindole, the specific antagonist of MR) . The cardiac function 72 h after reperfu?sion, oxidative stress damage related indicators, apoptotic index, infarct size, MR expression, SIRT1 expression, Ac-Foxo1 expres?sion were detected. Results Compared with the MI/R+V group, melatonin treatment group showed improved left ventricular ejection fraction (LVEF) (65.18±5.863) vs (47.37±4.201), ( P<0.01) and left ventricular fractional shortening (LVFS) (36.19±3.299) vs (22.80±0.8881), ( P<0.01), decreased myocardium superoxide generation (2.881±0.1908) RLU/(mg·s) vs (3.955±0.3022) RLU/(mg·s), ( P<0.01), malondialdehyde(MDA) level (269.1±11.24) pmol/mg vs (412.7±24.39) pmol/mg, ( P<0.01) and gp91phox expression (3.404±0.2440) vs (4.388±0.1463), ( P <0.01), up-regulated SIRT1 expression(0.8033±0.05357) vs(0.3313±0.04337), ( P<0.01), down-regulated Ac-Foxol expression(0.2393±0.01440) vs (0.3536±0.01384), ( P<0.01). More?over, Luz exposure significantly blocked melatonin's cardioprotective effect (all P<0.01). Conclusion The experiment showed that Mel pro?tected the heart against MI/R injury by reducing oxidative stress damage via activation of SIRT1 signaling in a MR dependent manner.